75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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* 程序清单：创建、初始化/脱离线程
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*
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* 这个例子会创建两个线程，一个动态线程，一个静态线程。
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* 静态线程在运行完毕后自动被系统脱离，动态线程一直打印计数。
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*/
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#include <rtthread.h>
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#define THREAD_PRIORITY 25
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#define THREAD_STACK_SIZE 512
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#define THREAD_TIMESLICE 5
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static rt_thread_t tid1 = RT_NULL;
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/* 线程1的入口函数 */
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static void thread1_entry(void *parameter)
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{
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rt_uint32_t count = 0;
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while (1)
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{
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/* 线程1采用低优先级运行，一直打印计数值 */
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rt_kprintf("thread1 count: %d\n", count++);
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rt_thread_mdelay(500); // 延时500毫秒
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}
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}
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static char thread2_stack[1024];
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static struct rt_thread thread2;
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/* 线程2入口 */
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static void thread2_entry(void *param)
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{
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rt_uint32_t count = 0;
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/* 线程2拥有较高的优先级，以抢占线程1而获得执行 */
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for (count = 0; count < 10 ; count++)
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{
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/* 线程2打印计数值 */
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rt_kprintf("thread2 count: %d\n", count);
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}
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rt_kprintf("thread2 exit\n");
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/* 线程2运行结束后也将自动被系统脱离 */
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}
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/* 线程示例 */
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int thread_sample(void)
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{
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/* 创建线程1，名称是thread1，入口是thread1_entry */
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tid1 = rt_thread_create("thread1",
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thread1_entry, RT_NULL,
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THREAD_STACK_SIZE,
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THREAD_PRIORITY, THREAD_TIMESLICE);
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/* 如果获得线程控制块，启动这个线程 */
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if (tid1 != RT_NULL)
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rt_thread_startup(tid1);
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/* 初始化线程2，名称是thread2，入口是thread2_entry */
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rt_thread_init(&thread2,
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"thread2",
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thread2_entry,
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RT_NULL,
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&thread2_stack[0],
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sizeof(thread2_stack),
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THREAD_PRIORITY - 1, THREAD_TIMESLICE);
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/* 启动线程2 */
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rt_thread_startup(&thread2);
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return 0;
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}
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/* 导出到 msh 命令列表中 */
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MSH_CMD_EXPORT(thread_sample, thread sample); |